package com.bondex.charter.controller;

import com.bondex.bondexapi.cas.service.CASVerifyLoginService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;

import javax.servlet.http.HttpServletRequest;

/**
 * web项目的Controller层基类
 *
 * @author JD
 * @date 2020/04/22
 */
@Controller
@CrossOrigin(origins = "*")
public class BaseWebController extends BaseController {

	//region 参数

	@Autowired
	protected CASVerifyLoginService casVerifyLoginService;

	//endregion

	//region 共同处理

	/**
	 * 获取用户真实IP地址，不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址,
	 * 参考文章： http://developer.51cto.com/art/201111/305181.htm
	 * <p>
	 * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？
	 * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。
	 * <p>
	 * 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130,
	 * 192.168.1.100
	 * <p>
	 * 用户真实IP为： 192.168.1.110
	 *
	 * @param request
	 * @return
	 */
	protected String getIpAddress(HttpServletRequest request) {
		String ip = request.getHeader("x-forwarded-for");
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_CLIENT_IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_X_FORWARDED_FOR");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
		}
		return ip;
	}

	/**
	 * 获取用户Token
	 */
	protected String getTokenInRequest(HttpServletRequest request) {
		try {
			return casVerifyLoginService.getTokenInRequest(request);
		} catch (Exception e) {
			return "";
		}
	}

	//endregion

}
